Detailed Description
2.1 Path feedrate F
Feeds (V1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-9
Master spindle switchover with G96, G961
If the master spindle is switched over when G96, G961 are active, the speed of the former
master spindle is retained. This corresponds to a transition from G96 to G97. The master
spindle newly defined with SETMS executes the "Constant cutting rate" function generated in
this way.
Alarms
Constant cutting rate G96, G961
• If no F value is programmed, alarm 10860 "No feedrate programmed" is output. The
alarm is not generated with G0 blocks.
• If a negative path velocity is programmed, alarm 14800 "Programmed path velocity
smaller than or equal to zero" is output.
• If a transverse axis has not been defined in machine data:
MD20100 DIAMETER_AX_DEF (geometry axes functioning as transverse axes)
when G96, G961 are active, alarm 10870 "No transverse axis defined" is output.
• If a negative maximum spindle speed is programmed with the LIMS program command
when G96, G961 are active, alarm 14820 "Negative maximum spindle speed
programmed for G96, G961" is output.
• If no constant cutting rate is programmed when G96, G961 is selected for the first time,
alarm 10900 "No S value programmed for constant cutting rate" is output.
2.1.4 Feedrate with G33, G34, G35 (thread cutting)
2.1.4.1 General
Application of G33
The function G33 can be used to machine threads with constant lead of the following type:
References:
/PA/ Programming Guide, Fundamentals
/PAZ/ Programming Guide, Cycles
Speed S, feedrate F, thread lead
A revolutional feedrate [mm/revolution] is used for G33 threads. The revolutional feedrate is
defined by programming the thread lead increase [mm/revolution].
The speed of the axes for the thread length is calculated from the programmed spindle
speed S and the thread lead.
Feedrate F [mm/min] = speed S [rev/min] * thread lead [mm/rev]
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